Hertel H08702391 Threading Insert Solid Carbide 3/8 Ic

Product Description

The HERTEL H08702391 is a laydown-style solid carbide threading insert designed for right-hand internal partial-profile 60-degree thread forms. Coated with TiC/TiN for wear resistance, this insert carries a manufacturer grade of HG330TR and covers a pitch range of 0.50 to 3.00 mm (48 to 8 TPI). The 3/8-inch inscribed circle and 0.146-inch thickness conform to standard 16IR toolholder geometry. This insert is intended for machinists and toolroom professionals running internal threading operations on CNC lathes and manual turning centers where consistent thread form and tool life are priorities.

This insert is suited for internal threading applications in production and job-shop environments. The partial-profile 60-degree geometry handles unified and metric thread forms within the specified pitch range. It fits standard 16IR toolholders used in small-bore internal threading operations. The TiC/TiN coating provides improved crater and flank wear resistance compared to uncoated carbide, making it appropriate for ferrous materials and general-purpose threading at moderate cutting speeds.

Key Features

• Solid carbide substrate with TiC/TiN multilayer coating for extended tool life
• Right-hand internal partial-profile 60-degree thread form
• Covers 48 to 8 TPI (0.50 to 3.00 mm pitch) in a single insert
• 3/8-inch (0.3750-inch decimal) inscribed circle for 16IR toolholder compatibility
• 0.146-inch thickness with zero-degree relief angle for laydown-style seating
• Manufacturer grade HG330TR suited for general-purpose threading on ferrous workpieces

Compatibility

Designed as an OEM-style replacement or direct-fit insert for standard 16IR internal threading toolholders accepting laydown-style carbide inserts with a 3/8-inch inscribed circle.

Installation Notes

Insert installation and indexing should be performed by a qualified machinist with the machine powered down and the spindle locked. Use the correct 16IR toolholder and ensure the insert seat is clean and free of chips before seating the insert. Apply the manufacturer-recommended torque range for your specific toolholder clamping screw — do not over-torque, as this can crack the carbide. Verify thread pitch and hand orientation against the job drawing before initiating a threading pass.